It isn’t clear that forest management would prevent bushfires. The consensus amongst the experts and royal commissions seems to be that there is no effective prevention.

There are harm minimisation strategies, but that would largely involve telling people where to live and some major restructuring of small urban centres.

I can conceive of a very expensive prevention strategy, with a real time detection system based on satellite imagery and distributed sensors, and then finding a way to put out early fires with minimum latency, maybe with advanced drones or some other very capable and numerous aerial vehicles. But that would cost billions.